I just realized, what does Tony Stark fill that hole in his chest with?

DataAngel

Sandwiches, and those teeny little boxes of raisins. Except on holidays. Then it's cranberry sauce or onion dip. It's always a little awkward the first few times he invites you to lunch or invites you to a party, but eventually you get used to it. When he's feeling really festive he puts on a necklace made of pita and fills it with hummus, or a cheese fondue.

There was one time when he tried to set up one of those chocolate fountains, but that quickly took a turn for the erotic and... Well. Let's just say that's one running of the Belmont Stakes that no one's going to find it easy to talk about for a few more years.